From Suzuki Paleotax db:
1960 Thecosphaera rotunda n. sp. Borisenko p. 222-223, pl. 1, figs. 3a, 3b, pl. 3, fig. 2a, 2b, 3a, 3b
1973 Thecosphaerella rotunda (Borisenko) Sanfilippo & Riedel p. 522, pl. 3, figs. 7-11, pl. 26, fig. 3
1984 Thecosphaera rotunda Borisenko Lipman pl. 1, fig. 4
1999 Thecosphaerella rotunda (Borisenko) Kozlova p. 80, pl. 7, figs. 1, 2; pl. 11; figs. 1, 2; pl. 27, figs. 1 4
1999 Thecosphaerella sp. aff. T. rotunda (Borisenko) Kozlova pl. 17, fig. 5
Catalog entries: Thecosphaera rotunda
Geological Range:
Last occurrence (top): within Paleogene Period (23.03-66.04Ma, top in Chattian stage). Data source: Lazarus et al. 2015 - "P age group"
First occurrence (base): within Paleogene Period (23.03-66.04Ma, base in Danian stage). Data source: Lazarus et al. 2015 - "P age group"
Plot of occurrence data:
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Thecosphaerella rotunda compiled by the radiolaria@mikrotax project team viewed: 11-7-2025
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